Forums/Z31P/z31-performance-upgrade-forums driveline-aa/Help....Going crazy!!!
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mkivgen1: (2013-05-28 00:30:32)
Hi:
Recently I installed an ACT clutch and after 75-100 miles started slipping. I started by changing both master and slave clutch cylinders and I noticed the pedal had no pressure. I took the tranny off and the clutch was covered in tranny fluid. The input shaft seal was bad so I replaced it. I bought from clutch masters a stage 5 kit, with the 6 puck bronze, ceramic whatever it is, installed a re-surfaced flywheel and immediatly, i noticed the pedal with no pressure al all again. I bled the system again, adjusted the pedal and the clutch is still slipping, still no pressure at the pedal, both master and slave cylinders are Tokiko brand, I bled the cylinders at the slave. Any ideas?
Thanks for all your input! it's driving me nuts!
G-E: (2013-05-28 00:36:23)
You bled it wrong, or you adjusted the pedal wrong and are unable to bleed it
My suggestion is bench bleed the cmc first, see if it's holding pressure, remanufactured ones are often screwy out of the box.. but I can't remember the last slave I had that was bad
mkivgen1: (2013-05-28 00:39:52)
Thanks for your quick answer!
Whats a CMC and how do I bench bleed the cylinder?
Thank you so much for your help!
ZEricMZ: (2013-05-28 03:02:59)
Clutch Master Cylinder. Do you happen to have a Haynes Manual? I would suggest going and buying one as well as downloading your year of factory service manual from http://www.xenonz31.com/reference.html. This will help you greatly.
mkivgen1: (2013-05-28 15:50:13)
No, I don't.....used to have o couple before I moved to the States but of course I lost them in the move. I was looking for one in Auto Zone or something but could not find one. I have changed a couple of those cylinders but I don't like any of the aftermarket since they can be used for so many cars, years and models. I guess I'll just buy the original ones and the line just to be sure is nothing related with the hydraulic system. And what about those diverter valves? Do those go bad? Never changed one but just in case....
G-E: (2013-06-01 08:45:48)
Try rockauto?
mkivgen1: (2013-06-04 01:56:26)
Well guys:
Changed both master and slave cylinders, both ordered OEM from courtesy nissan, as well as the clutch line. Bled it again and nothing, the pedal does not have any pressure at all, the only thing I noticed was where the line connects to the damper, I can't get that tight it just keeps rolling.
Parker: (2013-06-04 02:11:34)
You can bypass the damper. Buy an S130 front brake hose and run that from the clutch line straight to the slave cylinder.
That's probably not going to solve your no pedal pressure issue though, unless you have brake fluid leaking out of the connection between the damper and the clutch line. You don't have to keep adding brake fluid to the master cylinder reservoir, do you?
Parker: (2013-06-04 02:12:05)
Yeah, like frostvectron said. [archived image: rolleyes.png]
mkivgen1: (2013-06-04 02:31:40)
Well, before I changed the cylinders (today) I did noticed that the liquid was low, but I dont know if it was when I was bleeding it last time I forgot to add more, the floor was dry, I probably drove the car about 10 mi. after I changed the clutch for the 2nd time. And it still slipping like crazy....gonna try to eliminate the damper to see what happens, I refuse to believe that that pressure plate feels so soggy on the pedal, and that can't handle 400 hp....
Thank you guys for all your help!
Axel kain: (2013-06-04 02:41:05)
clutch pedal problems dont relate what so ever to clutch slip. unless it is adjusted wrong.
if the clutch is not broken in properly it wont hold power for crap. if the damper is failed/aero-locked then the pedal is going to be junk, bypass and bleed again properly, bench bleeding the clutch master is a bit over-rated, it doesnt take much to get fluid thru it. I usually will also compress the slave cyl by hand, crack the bleeder as a final.
mkivgen1: (2013-06-16 03:15:25)
Update:
Well guys, I eliminated the damper and bled the hell out of the cylinders, but I noticed something strange at the fork, it does not retract all the wat, I think the throw out bearing is resting on top of the pressure plate.
[http://[video=youtube_share;K9IG-huZJXM http://youtu.be/K9IG-huZJXM[/video]] https://youtu.be/K9IG-huZJXM]
I recently bought a 86 turbo tranny, and I dont recall if the tranny that I got of the car was a T5, can it be a different clutch fork in the T5? Is the T5 the 30a tranny? because I don't know is there a difference in clutch forks/throw out bearing sleeves. So I changed both cylinders, eliminated the damper, bled the clutch a couple of times adjusted the clutch (the pedal started to stick halfway when I adjusted the clutch) and I have a new 6 puck clutch used for about 10 to 15 miles. Don't know if I should buy a new fork or clutch or what else to do.
Any ideas?
Thanks!
Axel kain: (2013-06-16 14:14:24)
your video shows normal resting operation. going the other way is when things get tough! its also normal for the throw out bearing to be on/near the pressure plate, considering that's it home. 86T is T-5, but if unknown can be identified by pictures easily.
only thing I can think is either traction loss, or clutch slip.
G-E: (2013-06-18 03:14:25)
The block that has the TOB comes in several heights, you may have the wrong one if it doesn't disengage fully or push all the way
btw the T5 is the '90a
mkivgen1: (2013-06-19 16:05:39)
Is not traction loss, checked with another car next to mine w/ a friend looking at the tires and nothing....
mkivgen1: (2013-06-19 16:08:03)
I really don't know if I have the right TOB sleeve, so I went ahead and ordered a new one along with an 86 fork and pivot ball. And thank you for the clarification on the T5 being the 90a, there are so many num. IDK what's what.
mkivgen1: (2013-06-19 16:12:12)
I'll let everybody knows what happens in the next couple of weeks, bought the 3rd clutch (SPEC stage 5) hopefully it sticks i have changed everithing from the block back (flywheel, clutch twice, cylinders twice, clutch line, eliminated damper, tranny) so now I am changing the fork, TOB sleeve and pivot ball along with a new clutch, hopefully it works....
jaqattack02: (2013-06-19 17:34:57)
FWIW, the Throw Out Bearing assembly on Rock Auto, made by Timken, has the same part number for both the 86T and 86 NA.
mkivgen1: (2013-06-20 18:38:50)
But I wonder if is the same as the 85 tranny, I had a 85 tranny on the car and bought a 86 turbo t5 tranny. In the Courtesy Nissan web page it had 3 different TOB bearing sleeves.
Axel kain: (2013-06-21 00:12:50)
JUST to clarify, you ARE running break in procedure for 750-1000 miles before getting on it hard, correct? if not, it's a VERY quick way to smoke a brand new stage whatever clutch!
Axel kain: (2013-06-21 00:14:38)
71C, 90A, 30A's.
heck I think the TOB I replaced on my 280ZX was the same as one for my Z31!
mkivgen1: (2013-06-21 00:52:24)
Just got the parts for the car, hell as long as the stupid car works!
And I did get on it a little bit when I installed the 2nd clutch , maybe I screwed it up, but I did found tranny fluid under the car today again, probably the input shaft retainer went out again and its probably full of fluid again.
mkivgen1: (2013-07-04 16:58:36)
Well guys.....finally the clutch works!!!! took out the TOB sleeve and I noticed that the new one wan shorter. installed the new clutch fork and the new clutch (SPEC stage 5, and is the shizzniz!) and dumped the clutch pedal at 20 psi and it blew up the tires!! stomped on it 4th gear and worked like a boss!!! so relieved!! Thank you guys for all the help!!! now off to dyno tune itto see if i can break the 450 with no cams…
again thank you for all the help!!!!
862sik: (2013-07-04 21:38:04)
I was going to say that your TOB was wrong. I had it confirmed that all the TOB were the same but when I received mine it was not correct. Even SBC said it was the same. I think they found out with a little investigation. It was something different with my 71c and my T5. Oh well, I noticed it before install…so I didn't run into hell like you LOL.
G-E: (2013-07-04 22:04:44)
You're welcome :P